Absorbed Glass Mat(AGM) is the latest in motorcycle battery technology. Sealed AGM batteries completely eliminate the hassles of conventional battery maintenance. There is no liquid acid in the AGM battery. All of the acid is absorbed into the compressed glass matting in the cells. They are completely Non-Spillable, so they can be shipped by U.S. Mail or UPS with no hazardous warnings or extra fees. They can be mounted in any position for special applications. Our AGM batteries re-combine the oxygen and hydrogen as the batteries charge and discharge to make them truly maintenance free. No liquid ever needs to be added, No leaks, spills or vent tubes. AGM batteries have higher cold cranking Amps and hold a charge much longer.